This sentence begins with SUNECOMAI which I take as a descriptive or
progressive present. The force of the phrase EK TWN DUO is that of a
genitive of means/instrument. Paul is kept in a dilemma by both of his
options. The article here is anaphoric (it points back to the two concepts
in v. 21). EXWN seems to be a circumstantial participle. please correct any
errors from above, now I am stuck:

1. What is the use of the infinitive in EIS TO ANALUSAI? What aspect is in
view?
2. What is the use of the infinitive in EINAI? What aspect is in view?
3. How would you classify KREISSON? As a simple comparative adjective?
4. How would you identify AVAGKAIOTERON? Wallace mentions something called
"comparative for elative" p. 300. Where "the quality expressed by the
objective is intensified, but not making a comparison."